if it beyond RMA - Asus has 3 and 5 year limited warranties I would check that 1st they are good about getting you a working board
Also Intel has made a price drop! I haven't seen this happen in years !! This may breath new life into x99 Systems and for those who want "40 pci lanes" don't have to spend over 600 us dollars
https://www.amazon.com/s?field-keywords=6850k&tag=amz-mkt-ie-us-20&ascsubtag=1ba00-01000-org00-def00-dsk00-nomod-us000-gatwy-feature-SEARC
In my opinion, new systems are incremental bumps of improvement hardy worth a complete system overhaul atm.